Catalytic upgrading of lignin

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.advisorKarinen, Reetta
dc.contributor.advisorHakonen, Johanna
dc.contributor.authorGarza Treviño, Ricardo
dc.contributor.schoolKemian tekniikan korkeakoulufi
dc.contributor.supervisorLehtonen, Juha
dc.date.accessioned2015-09-18T08:45:17Z
dc.date.available2015-09-18T08:45:17Z
dc.date.issued2015-08-25
dc.description.abstractIn the broadest vision to contribute to sustainability, with focus on the use of lignin as a sustainable source for the production of chemicals, experiments were performed to find which chemicals may potentially be produced from isolated (organosolv-extracted) lignin through its decomposition by hydrodeoxygenation, as well as to describe the properties and composition of the product as a whole. Catalyst screening was implemented to evaluate the optimal catalyst to obtain low molecular weight organic compounds. The catalyst screening results of the light bio-oil reaction product fraction showed lowest molecular weights for the experiment involving the Pd/C 3% catalyst with values of 363.4 g/mol of number average and 583.9 g/mol of weight average, as well as fraction of light (monomers and dimers) compounds of 24.1%. The experiment involving the Pd/Al2O3 5% showed the highest molecular weights and lowest light compounds fraction. Regarding the gas product, the experiment involving the Pd/Al2O3 5% catalyst exhibited a considerably high amount of methane, and a considerably low amount of hydrogen concentration compared to the other experiments. In regards to the mass balance of the product streams excluding the gas phase, the Pd/Al2O3 5% catalyst showed the highest amount of light bio-oil, however, also the highest amount of char. On the other hand, the lowest amounts of both light bio-oil and char belonged to the experiment involving the Pd/C 3% catalyst. GC-MS analysis was performed to identify 24 small molecular weight compounds. The most representative compounds for the experiments involving the Pd/C 3%, ZrO2, and Pd/Al2O3 5% catalysts were 4-propylsyiringol, trans-4-propenylsyringol, and dihydrosinapyl alcohol, respectively.en
dc.format.extent59 + 8
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/17774
dc.identifier.urnURN:NBN:fi:aalto-201509184389
dc.language.isoenen
dc.locationPKfi
dc.programmeMaster’s Degree Programme in Environomical Pathways for Sustainable Energy Systemsen
dc.programme.majorBiorefineriesfi
dc.programme.mcodeKM3005fi
dc.rights.accesslevelopenAccess
dc.subject.keywordorganosolven
dc.subject.keywordligninen
dc.subject.keywordcatalyticen
dc.subject.keywordupgradingen
dc.subject.keywordmonoaromaticsen
dc.subject.keywordhydrodeoxygenationen
dc.titleCatalytic upgrading of ligninen
dc.typeG2 Pro gradu, diplomityöen
dc.type.okmG2 Pro gradu, diplomityö
dc.type.ontasotMaster's thesisen
dc.type.ontasotDiplomityöfi
dc.type.publicationmasterThesis
local.aalto.idinssi52106
local.aalto.openaccessyes
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
master_Garza_Treviño_Ricardo_2015.pdf
Size:
3.28 MB
Format:
Adobe Portable Document Format